#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Adafruit_PCD8544.h>
#include <Wire.h>
#include "RTClib.h"

// LCD pin connections (matches your circuit)
Adafruit_PCD8544 display = Adafruit_PCD8544(7, 6, 5, 4, 3);

// RTC instance
RTC_DS1307 rtc;

// Time set button pins
const int hs = 8;  // Hour set button
const int ms = 9;  // Minute set button

void setup() {
  // Initialize LCD
  display.begin();
  display.setContrast(50);
  display.clearDisplay();

  // Initialize RTC
  if (!rtc.begin()) {
    display.setCursor(0, 0);
    display.println("RTC not found!");
    display.display();
    while (1);
  }

  if (!rtc.isrunning()) {
    // Set RTC to compile time if not running
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }

  // Button inputs
  pinMode(hs, INPUT);
  pinMode(ms, INPUT);
}

void loop() {
  // Read current time from RTC
  DateTime now = rtc.now();

  // Clear display buffer
  display.clearDisplay();

  // Display hours, minutes, seconds
  display.setTextSize(1);
  display.setCursor(10, 5);
  int h = now.hour();
  int m = now.minute();
  int s = now.second();

  // Convert to 12-hour format
  int displayHour = h % 12;
  if (displayHour == 0) displayHour = 12;

  display.print(displayHour);
  display.print(":");
  if (m < 10) display.print("0");
  display.print(m);
  display.print(":");
  if (s < 10) display.print("0");
  display.print(s);

  // Display AM / PM
  display.setCursor(10, 20);
  if (h < 12) display.println("AM");
  else        display.println("PM");

  // Message line
  display.setCursor(10, 35);
  display.print("arvind");

  // Push data to LCD
  display.display();

  // ----------- Time Setting Section ----------- //
  if (digitalRead(hs) == HIGH) {
    // Add one hour
    DateTime newTime = now + TimeSpan(3600);
    rtc.adjust(newTime);
    delay(300); // debounce
  }

  if (digitalRead(ms) == HIGH) {
    // Add one minute
    DateTime newTime = now + TimeSpan(60);
    rtc.adjust(newTime);
    delay(300); // debounce
  }

  delay(200); // small refresh delay
}